<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8" />
		<meta name="viewport" content="width=device-width, initial-scale=1">
		<title>web site</title>
	</head>
	<body>
		<script>
			console.log(fn);
			console.log(fn());
			function fn(){
				var arr = [1,3,3];
			}
		</script>
	</body>
</html>